Figure 1.
Dopamine D2/D3 receptor availability (BPND) in healthy control (white bars) and methamphetamine-dependent (black bars) subjects. Data are presented as means ± SE. Values from left and right hemispheres were averaged (weighted by number of voxels) as they were highly correlated (all p values <0.001; all correlation coefficients >0.932). *Significant group difference after correcting for age by ANCOVA, p < 0.05 (after Holm–Bonferroni correction for 3 comparisons). Smoking status was not used as a covariate because smoking status had no main effects.